package com.mapper;

import com.domain.BlogArticle;
import org.apache.ibatis.annotations.*;

import java.util.List;

@Mapper
public interface BlogArticleMapper {
    //根据id查询文章信息
    @Select("SELECT * FROM t_article WHERE id=#{id}")
    public BlogArticle selectArticleWithId(Integer id);

    @Insert("INSERT INTO t_article (title,created,modified,tags,categories," +
            "allow_comment, thumbnail, content)" +
            " VALUES (#{title},#{created},#{modified},#{tags},#{categories}," +
            " #{allowComment},#{thumbnail},#{content})")
    @Options(useGeneratedKeys = true, keyProperty = "id", keyColumn = "id")
    public Integer publishArticle(BlogArticle article);

    //文章分页查询
    @Select("SELECT * FROM t_article ORDER BY id DESC")
    public List<BlogArticle> selectArticleWithPage();

    //通过id删除文章
    @Delete("DELETE FROM t_article WHERE id=#{id}")
    public void deleteArticleWithId(int id);

    //站点服务统计，统计文章数量
    @Select("SELECT COUNT(1) FROM t_article")
    public Integer countArticle();

    //通过id更新文章
//    @Update("UPDATE t_article SET title=#{title},created=#{created},modified=#{modified},tags=#{tags},thumbnail=#{thumbnail},content=#{content},"+
//    "categories=#{categories},hits=#{hits},comments_num= #{commentsNum},allow_comment=#{allowComment} WHERE id=#{id}")
//    public Integer updateArticleWithId(BlogArticle article);
    @Update({
            "<script>",
            "UPDATE t_article",
            "<set>",
            "<if test='title != null'>title = #{title},</if>",
            "<if test='content != null'>content = #{content},</if>",
            "<if test='created != null'>created = #{created},</if>",

            "<if test='categories != null'>categories = #{categories},</if>",
            "<if test='tags != null'>tags = #{tags},</if>",
            "<if test='allowComment != null'>allowComment = #{allowComment},</if>",
            "<if test='thumbnail != null'>thumbnail = #{thumbnail},</if>",
            "modified = CURRENT_TIMESTAMP," +
            "</set>",
            "WHERE id = #{id}",
            "</script>"
    })
    public Integer updateArticleWithId(BlogArticle article);

}
